fixed-line phone; landline telephone
Technical term for a traditional wired telephone line, as opposed to mobile or IP phones. Often used in official or service contexts.
To apply for a fixed-line phone subscription, you need to go to an NTT service counter.
固定電話 is the common everyday term for a landline phone. 通常加入電話 is a more formal, technical term used mainly in contracts and service descriptions.
Compound of 通常 (つうじょう, 'ordinary, regular') + 加入 (かにゅう, 'subscription, joining') + 電話 (でんわ, 'telephone'). The term refers to a standard subscription-based telephone line.